It depends on the venue as to the price. Two of us used this deal (thanks to skybluearmyontour) at Leicester last Thursday and it was £26 for us both. We then took them up on the voucher offer (first time there) of £15 each for two 15 minute sessions any time in the next 3 months.
It's not £20
I posted this already Original Deal Link
Thanks Vinnie (y)
Book one full paying adult or child karting session and get another driver for just £1!! Available on selected Open Timed Race sessions only Valid for adult or child karting where all children must be aged 8 years and upwards and have an inside leg measurement of at least 25 inches (measurement taken from crotch to heel of shoe) All drivers must race on the same race session when using this offer Offer is valid Sunday to Friday until Monday 24th December 2018 Offer excludes any sessions held on Saturdays All sessions must be booked and raced before Offer end date No offer can be used in conjunction with any other All discounted racing sessions must be pre-booked Offers are only available on new bookings and are subject to availability